From mboxrd@z Thu Jan 1 00:00:00 1970 From: Srikanth Date: Fri, 23 May 2003 12:38:20 +0000 Subject: Re: [LARTC] CBQ DEVICE BW? MIME-Version: 1 Content-Type: multipart/mixed; boundary="------------030602050805000103040106" Message-Id: List-Id: References: In-Reply-To: To: lartc@vger.kernel.org --------------030602050805000103040106 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit One more question, Stef Coene wrote: >On Friday 23 May 2003 10:44, Srikanth wrote: > > >>Hi, >> >>The CBQ config file shud be some thing like this. >> >>DEVICE=eth0,10Mbit,1Mbit >>RATE=50Kbit >>WEIGHT=5Kbit >> >>Shall i hardcode the DEVICE BW as 10/100 Mbit >>or >>Shall i use any other tool like ethtool for getting this. >>ethtool gives Speed: 10Mbps >> >>If so, how about, if i use some other Interfaces other than eth0, >>like ppp0 or some other? >> >>C'd anybody can give a suggestion over this? >> >> >Bandwidth should be the real physical bandwidth of the device. > > How do i get the real physical bandwidth of the device? The below program attached is giving the value 6, on my system. In some other systems, it's giving 2 (don't know whether Kbps/Mbps). >Stef > /* * Gets the bandwidth of the interface. */ #include #include #include #include #include #include #include #include #include #include //#include #include #include #include "ifstats.h" extern int errno; int IFSGetBandwidth (if_stats_desc_struct * ifsd) { //#ifdef HAS_SIOCGIFINDEX int s, status; struct ifreq ifr; struct in_addr ina; if_ip_addr_union ip; if (ifsd == NULL) { printf("case 1\n"); return (-1); } /* Must have a specified interface. */ if (ifsd->interface == NULL) { printf("case 2\n"); return (-1); } /* Create a UDP socket. */ s = socket (AF_INET, SOCK_DGRAM, 0); if (s < 0) { printf("case 3\n"); return (-1); } /* Set interface name explicitly from ifsd. */ strncpy (ifr.ifr_name, ifsd->interface, IFNAMSIZ); ifr.ifr_name[IFNAMSIZ - 1] = '\0'; /* Get bandwidth of interface and put into interface request * * structure. * */ status = ioctl(s, SIOCGIFINDEX, &ifr); /* Close socket. */ close (s); /* ioctl() failed? */ if (status < 0) { perror("! Ioctl"); printf("case 4\n"); return (-1); } ifsd->bandwidth = ifr.ifr_bandwidth; printf("Hello World\n"); printf("Bandwidth: %i\n", ifsd->bandwidth); //#endif /* HAS_SIOCGIFINDEX */ return (0); } main () { int retVal; if_stats_desc_struct * ifsd; ifsd = (if_stats_desc_struct *) malloc(sizeof(if_stats_desc_struct)); if (ifsd == NULL) perror("! Malloc"); ifsd->interface = (char *) malloc(20); if (ifsd->interface == NULL) perror("! Malloc"); strcpy(ifsd->interface, "eth0"); retVal = IFSGetBandwidth (ifsd); free(ifsd->interface); free(ifsd); printf("retVal = %d\n", retVal); } regards, Srikanth. > > > --------------030602050805000103040106 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit One more question,

Stef Coene wrote:

On Friday 23 May 2003 10:44, Srikanth wrote:

Hi,

The CBQ config file shud be some thing like this.

DEVICE=eth0,10Mbit,1Mbit
RATE=50Kbit
WEIGHT=5Kbit

Shall i hardcode the DEVICE BW as 10/100 Mbit
or
Shall i use any other tool like ethtool for getting this.
ethtool gives Speed: 10Mbps

If so, how about, if i use some other Interfaces other than eth0,
like ppp0 or some other?

C'd anybody can give a suggestion over this?

Bandwidth should be the real physical bandwidth of the device.

How do i get the real physical bandwidth of the device?

The below program attached is giving the value 6, on my system.
In some other systems, it's giving 2 (don't know whether Kbps/Mbps).

Stef

/*
*    Gets the bandwidth of the interface.
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <errno.h>

#include <db.h>
#include <sys/types.h>
#include <sys/time.h>
#include <fcntl.h>

#include <sys/socket.h>
#include <sys/ioctl.h>
//#include <netdb.h>

#include <linux/in.h>
#include <linux/if.h>
#include "ifstats.h"

extern int errno;

int
IFSGetBandwidth (if_stats_desc_struct * ifsd)
{
//#ifdef HAS_SIOCGIFINDEX
int s, status;
struct ifreq ifr;
struct in_addr ina;
if_ip_addr_union ip;

if (ifsd == NULL)
    {
        printf("case 1\n");
        return (-1);
    }

/* Must have a specified interface. */
if (ifsd->interface == NULL)
    {
        printf("case 2\n");
    return (-1);
    }

/* Create a UDP socket. */
s = socket (AF_INET, SOCK_DGRAM, 0);
if (s < 0)
    {
        printf("case 3\n");
    return (-1);
    }

/* Set interface name explicitly from ifsd. */
strncpy (ifr.ifr_name, ifsd->interface, IFNAMSIZ);
ifr.ifr_name[IFNAMSIZ - 1] = '\0';

/*   Get bandwidth of interface and put into interface request
     *            *   structure.
     *                     */
status = ioctl(s, SIOCGIFINDEX, &ifr);

/* Close socket. */
close (s);

/* ioctl() failed? */
if (status < 0)
    {
        perror("! Ioctl");
    printf("case 4\n");
    return (-1);
    }

ifsd->bandwidth = ifr.ifr_bandwidth;
printf("Hello World\n");
printf("Bandwidth: %i\n", ifsd->bandwidth);

//#endif /* HAS_SIOCGIFINDEX */

return (0);
}

main ()
{
    int retVal;
    if_stats_desc_struct * ifsd;

    ifsd = (if_stats_desc_struct *) malloc(sizeof(if_stats_desc_struct));
    if (ifsd == NULL)
        perror("! Malloc");

    ifsd->interface = (char *) malloc(20);
    if (ifsd->interface == NULL)
        perror("! Malloc");
    strcpy(ifsd->interface, "eth0");
    retVal = IFSGetBandwidth (ifsd);
    free(ifsd->interface);
    free(ifsd);
    printf("retVal = %d\n", retVal);
}

regards,
Srikanth.

  

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